[Histonet] Removing PMMA blocks from glass vials

[Monfils, Paul]

Someone gave me some small PMMA blocks polymerized inside glass scintillation vials.  I always use plastic vials.  Obviously the vials have to be broken to get the blocks out.  Does anyone have some advice on the best way to do this?  The guy who brought them said he thought I could "use liquid nitrogen", but had no specifics.  Any help will be appreciated.